JP2007076224A - Manufacturing apparatus of carbon-fiber reinforced thermoplastic tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing apparatus of a carbon-fiber reinforced thermoplastic tape which prevents troubles such as a tape deformation and a cutting of a carbon fiber inside a resin impregnation device accompanying accumulation of feathers in manufacturing the thermoplastic resin tape. <P>SOLUTION: The manufacturing apparatus is provided with the molten resin impregnation device 6 where a carbon fiber 4 running inside is impregnated with a molten thermoplastic resin, and a downstream slit nozzle 12 passing through the molten thermoplastic resin to pull out the carbon fiber 4 impregnated with the molten resin, and has a constitution that a nozzle upper member 20 and a nozzle lower member 26 are attached to a downstream side end of the resin impregnation device 6 coming between at a fixed interval, and at the same time, a means 36 biasing at least one of the nozzle upper member 20 and the nozzle lower member 26 to a direction of reducing the gap between the nozzle upper member 20 and the nozzle lower member 26 mutually is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for producing a carbon fiber reinforced thermoplastic resin tape. This apparatus can prevent troubles such as cutting of the carbon fiber and deformation of the tape inside the resin impregnation apparatus (resin impregnation cross die head) accompanying the accumulation of fuzz during production of the thermoplastic resin tape.

  Carbon fiber and carbon fiber composite material have high tensile strength / tensile modulus, excellent heat resistance, chemical resistance, fatigue characteristics, wear resistance, low linear expansion coefficient, excellent dimensional stability, electromagnetic shielding, X Because of its excellent features such as high line permeability, it is widely applied to sports and leisure, aerospace and general industrial applications. Conventionally, a thermosetting resin such as an epoxy resin is often used as a matrix of a composite material, but recently, a thermoplastic resin has attracted attention from the viewpoint of recyclability and high-speed moldability.

  As an apparatus for manufacturing an intermediate material for fiber reinforced resin composite material using a thermoplastic resin as a matrix, a molten thermoplastic resin is housed inside, and a reinforcing fiber that is traveling inside is melted by being impregnated with a molten thermoplastic resin. A resin impregnation apparatus, a resin supply path for supplying molten thermoplastic resin, an upstream nozzle for supplying carbon fiber, and a downstream nozzle for extracting carbon fiber impregnated with molten resin passing through the molten thermoplastic resin; There is an apparatus for producing an intermediate material (so-called long fiber pellet) for fiber-reinforced thermoplastic resin composite material provided with (for example, see Patent Document 1).

However, when manufacturing an intermediate material for manufacturing a composite material having a wide and thin shape such as a tape shape, for example, if a general rectangular ceramic nozzle is used, a fluff derived from carbon fiber is used in a downstream nozzle for drawing carbon fiber. Accumulation of carbon fibers often caused cutting problems.
JP 2003-305777 A (Claims)

  The inventor newly manufactured a carbon fiber reinforced thermoplastic resin tape manufacturing apparatus shown in FIG. 6 and attempted to manufacture a thermoplastic resin tape using this apparatus.

  6A is a front view of the manufacturing apparatus, and FIG. 6B is a right side view of the manufacturing apparatus.

  In FIG. 6, 92 is an apparatus for producing a carbon fiber reinforced thermoplastic resin tape. The manufacturing apparatus 92 includes a molten resin impregnation apparatus 96 in which a molten thermoplastic resin is housed and the carbon fiber 94 traveling inside is impregnated with the molten thermoplastic resin, and a resin supply for supplying the molten thermoplastic resin. A path 98, an upstream slit nozzle 100 for supplying carbon fibers, and a downstream slit nozzle 102 for drawing carbon fibers impregnated with a molten resin that passes through the molten thermoplastic resin are provided.

  The molten resin impregnation device 96 includes an upper mold part 104, a space part 106 and a lower mold part 108. A nozzle upper member 110 is attached to the support frame 112 at the downstream end of the resin impregnation apparatus upper mold part 104 and is fixed to the support frame 112 by an insertion bar 114. A nozzle lower member 116 is attached to the support frame 112 at the downstream end of the resin impregnation apparatus lower mold part 108, and is fixed to the support frame 112 by an insertion bar 118. The downstream slit nozzle 102 is formed by a gap between the nozzle upper member 110 and the nozzle lower member 116. The support frame 112 is fixed by fixed ends 120a and 120b. Further, both the nozzle upper member 110 and the nozzle upper member 116 are heated.

  In this manufacturing apparatus 92, the carbon fibers 94 are supplied from the upstream slit nozzle 100 to the resin impregnation apparatus space 106 in the form of strands in which usually 1000 to 48000 single fibers are bundled. The carbon fiber strands 94 traveling in the resin impregnating device space 106 are conveyed in a zigzag manner along the squeezing bar 122 attached to the nozzle upper member 110 and the nozzle lower member 116 and are pressed by the squeezing bar 122 to defibrate. And impregnated with molten thermoplastic resin. The carbon fiber 94 impregnated with the molten thermoplastic resin passes through the downstream slit nozzle 102 and is drawn out in the form of a carbon fiber reinforced thermoplastic resin tape.

  However, when the tape is manufactured using the manufacturing apparatus 92, the fluff generated during traveling in the molten resin impregnation apparatus 96 is accumulated in the carbon fiber fiber upstream of the downstream slit nozzle 102 for fiber drawing. Troubles such as fiber cutting may occur. This trouble tends to occur more frequently as the gap between the slit nozzles becomes narrower.

  While the present inventor has repeatedly studied to solve the above problem, the nozzle lower member is attached at a predetermined interval, and the nozzle upper member is arranged in a direction to reduce the gap between the nozzle upper member and the nozzle lower member. It has been considered to provide means for urging at least one of the member and the nozzle lower member. As a result, when fluff accumulates on the upstream side of the nozzle and a part of the gap of the slit nozzle is blocked, the normal component of the force that tries to pull the fluff in the downstream direction exceeds the restraining pressure of the urging means, and the nozzle It has been found that the upper member is lifted and / or the nozzle lower member is depressed to naturally deliver the fluff downstream.

  Further, it has been found that by providing a cooling metal roller or a slit blower immediately downstream of the downstream slit nozzle, it is possible to prevent tape deformation in which the tape width is narrowed.

  Furthermore, the resin impregnating device upper mold part and the resin impregnating apparatus lower mold part are configured to be detachable so that the raw fiber can be easily guided and attached at the start of operation or when the raw fiber is replaced. As a result, the present invention has been completed.

  Accordingly, an object of the present invention is to provide an apparatus for producing a carbon fiber reinforced thermoplastic resin tape that solves the above-mentioned problems.

  The present invention for achieving the above object is as follows.

  [1] A resin supply path for supplying a molten thermoplastic resin and an upstream slit nozzle for supplying a carbon fiber are provided, and the molten thermoplastic resin is housed inside and the carbon fiber that runs inside the molten thermoplastic resin is a molten thermoplastic resin. An apparatus for producing a carbon fiber reinforced thermoplastic resin tape, comprising: a molten resin impregnating apparatus impregnated in a step; and a downstream slit nozzle for drawing out carbon fibers impregnated with the molten resin through the molten thermoplastic resin. The nozzle upper member and the nozzle lower member are attached to the downstream end portion of the resin impregnation apparatus at a predetermined interval, and the nozzle upper member and the nozzle in a direction to reduce the gap between the nozzle upper member and the nozzle lower member. An apparatus for producing a carbon fiber reinforced thermoplastic resin tape comprising means for urging at least one of the lower members.

  [2] The apparatus for producing a carbon fiber reinforced thermoplastic resin tape according to [1], wherein the nozzle upper member and the nozzle lower member are rollers provided with means for temperature control in a range of 100 to 400 ° C.

  [3] The apparatus for producing a carbon fiber-reinforced thermoplastic resin tape according to [1], wherein a cooling metal roller is provided downstream of the downstream slit nozzle.

  [4] The apparatus for producing a carbon fiber reinforced thermoplastic resin tape according to [1], having a slit blower downstream of the downstream slit nozzle.

  [5] The apparatus for producing a carbon fiber reinforced thermoplastic resin tape according to [1], wherein the upper mold part of the resin impregnation apparatus and the lower mold part of the resin impregnation apparatus are configured to be detachable.

  [6] The carbon fiber-reinforced thermoplastic resin tape manufacturing apparatus according to [1], wherein a gap between the nozzle upper member and the nozzle lower member is 450 μm or less.

  In the carbon fiber reinforced thermoplastic resin tape manufacturing apparatus of the present invention, when the fuzz accumulates in the downstream slit nozzle and the surface pressure of the molten resin contact surface increases, the suppression pressure of the pressure cylinder decreases according to the surface pressure. Then, the nozzle upper member is lifted, and the fluff is pulled out from the downstream slit nozzle together with the tape, and the accumulation of the fluff is eliminated.

  In addition, when a cooling metal roller or a slit blower is provided in the vicinity of the downstream slit nozzle and downstream thereof, it is possible to prevent tape deformation in which the tape width is narrowed.

  Furthermore, the resin impregnating device upper mold part and the resin impregnating apparatus lower mold part are configured to be detachable as required, so that it is easy to guide and attach the raw material fibers when starting operation or when changing the raw material fibers. Can improve productivity.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view showing an example of a production apparatus for carbon fiber reinforced thermoplastic resin tape of the present invention, (A) is a front view of the production apparatus, and (B) is a right side view of the production apparatus. is there.

  In FIG. 1, 2 is an apparatus for producing a carbon fiber reinforced thermoplastic resin tape.

  6 is a substantially rectangular parallelepiped molten resin impregnation apparatus, which comprises a bowl-shaped upper mold part 14 whose lower surface is opened and a bowl-shaped lower mold part 18 whose upper surface is opened, and an upper mold part 14 and a lower mold part 18. Are fitted together to form a space 16 therein. The downstream end portion of the resin impregnating apparatus upper mold portion 14 is formed of a member (sliding member) P made of a sliding material chamfered in a substantially circular arc shape. A nozzle upper member 20 made of a roller is attached to the sliding member P on a U-shaped upper support frame 22 while being liquid-tightly pressed against the sliding member P, and is fixed by an insertion bar 24. At the downstream end of the lower part 18 of the resin impregnating apparatus, a lower nozzle support member 28a, 28b is formed in a state in which a nozzle lower member 26 made of a roller is pressed against the sliding member P in a liquid-tight manner as in the upper mold part 14. And is fixed by an insertion bar 30. The downstream slit nozzle 12 is formed by a gap between the nozzle upper member 20 and the nozzle lower member 26.

  The gap between the nozzle upper member and the nozzle lower member depends on the fineness of the carbon fibers used and the volume content of the fibers of the carbon fiber reinforced thermoplastic resin tape, but is preferably 450 μm or less, more preferably 20 to 300 μm, 30 ˜100 μm is particularly preferred. The nozzle upper member 20 and the nozzle upper member 26 are both heated. The heating temperature is preferably in the vicinity of the melting point of the resin from the temperature in the molten resin impregnation apparatus 6. This temperature is usually controlled in the range of 100 to 400 ° C, preferably 150 to 300 ° C.

  The lower support frames 28a and 28b are connected and fixed at fixed ends 32a and 32b. On the other hand, the upper support frame 22 is connected to a pressure cylinder 36 that is an urging means so as to be swingable in the vertical direction. For this reason, the nozzle upper member 20 has a structure in which the vertical movement is controlled by the pressure cylinder 36.

  The gap between one lower end 38a of the upper support frame 22 and the upper end 40a of the lower support frame 28a and the gap between the other lower end 38b of the upper support frame 22 and the upper end 40b of the lower support frame 28b are both slits on the downstream side. The gap is the same as that of the nozzle 12.

  In a normal operation, the gap between one lower end 38a of the upper support frame 22 and the upper end 40a of the lower support frame 28a and the other lower end of the upper support frame 22 so that the gap between the downstream slit nozzles 12 is constant. Gap adjustment members 42a and 42b such as shim tape are sandwiched between the gaps 38b and the upper end 40b of the lower support frame 28b. The gap between the downstream slit nozzles 12 can be adjusted by changing the thickness of the gap adjusting members 42a and 42b.

  44a is a predetermined number (five in this figure) of upper iron bars (fixed) attached to the upper mold part 14, and 44b is a predetermined number (five in this figure) of lower iron bars attached to the lower mold part 18. (Fixed). In FIG. 1, an arrow X indicates the traveling direction of the carbon fiber strand 4, and 8 is a resin supply path for supplying a molten thermoplastic resin.

  FIG. 5 is a schematic view showing a state where the resin impregnating apparatus upper mold part 14 is lifted from the resin impregnating apparatus lower mold part 18 in the manufacturing apparatus of the example of FIG. 1, and (A) is a front view of the manufacturing apparatus. And (B) is a right side view of the manufacturing apparatus. In FIG. 5, since the configuration other than the opening and closing of the apparatus is the same as that of FIG. 1, the same reference numerals are assigned to the same portions.

  In the manufacturing apparatus 2, the carbon fibers 4 are usually supplied from the upstream slit nozzle 10 to the resin impregnation apparatus space 16 in the form of strands composed of 1000 to 48000 single fibers. The carbon fiber strand 4 traveling in the resin impregnating device space 16 is pressed by the squeezing bars 44a and 44b and is defibrated while traveling zigzag and is impregnated with a molten thermoplastic resin. The carbon fiber 4 impregnated with the molten thermoplastic resin is passed through the downstream slit nozzle 12 and drawn out in the form of a carbon fiber reinforced thermoplastic resin tape.

  By using this manufacturing apparatus 2, when the fluff accumulates on the upstream side of the downstream slit nozzle 12 and a part of the gap of the slit nozzle is blocked, the tape and the fluff in a state of being entangled with the tape are moved in the downstream direction. The normal component of the force to be taken up becomes equal to or higher than the pressure of the biasing means 36, the nozzle upper member 20 is lifted, and the fluff is naturally discharged. Examples of the urging means include a pressure cylinder and a spring.

  Further, in preparation for the case where a large amount of fluff flows from the upstream at once, a pressure sensitive sensor for detecting the surface pressure is provided on the molten resin contact surface of the nozzle upper member, and the biasing means 36 is based on the signal of the pressure sensitive sensor. It is also possible to move the nozzle upper member 20 up and down by actuating.

  During operation, the nozzle upper member and the nozzle lower part are monitored to monitor the defects that a large amount of fluff is intensively mixed in one place of the carbon fiber reinforced thermoplastic resin tape and the resin basis weight abnormality in the carbon fiber reinforced thermoplastic resin tape. It is desirable to always measure the gap between members using a laser sensor or the like.

  The resin impregnating apparatus lower mold part 18 is in contact with both the nozzle upper member 20 and the nozzle lower member 26, and the sliding member on the resin impregnating apparatus lower mold part 18 side is the nozzle lower member on both the contact surface on the nozzle upper member 20 side. The contact surface on the 26th side has the same shape. Moreover, the sliding member of the lower part 18 of the resin impregnating apparatus is made of a material having moderate strength and flexibility such as gun metal. Therefore, the contact surface of the resin impregnation apparatus lower mold portion 18 with the nozzle upper member 20 and the nozzle lower member 26 has a structure in which the molten resin does not leak.

  Further, in this example, the nozzle upper member 20 is formed to swing up and down, but the nozzle lower member 26 may swing up and down.

  FIG. 2 is a schematic view showing another example of the carbon fiber reinforced thermoplastic resin tape production apparatus of the present invention, (A) is a front view of the production apparatus, and (B) is a right side view of the production apparatus. FIG.

  In the manufacturing apparatus 52 in the example of FIG. 2, the nozzle upper member 54 and the nozzle lower member 56 are non-rotatable members instead of rollers. The members 54 and 56 are formed of so-called bowl-shaped semi-cylinders whose surfaces facing each other are formed in an arc shape.

  By using this non-rotatable member, the accumulation elimination function of fluff is somewhat lower than that of the manufacturing apparatus of the example of FIG. 1, but is higher than that of the manufacturing apparatus of the example of FIG. In addition, compared with the manufacturing apparatus of the example of FIG. 1, the manufacturing apparatus of the example of FIG. 2 has the characteristics which can manufacture a carbon fiber reinforced thermoplastic resin tape with the manufacturing apparatus of a simple structure.

  Since other configurations are the same as those in FIG. 1, the same reference numerals are given to the same portions and the description thereof is omitted.

  FIG. 3 is a schematic front view showing still another example of the carbon fiber reinforced thermoplastic resin tape manufacturing apparatus of the present invention.

  In the manufacturing apparatus 62 in the example of FIG. 3, cooling metal rollers 64 and 66 having a temperature of about 20 ° C. are provided immediately downstream of the downstream slit nozzle 12. When the tape is manufactured using the manufacturing apparatus 62, the tape drawn from the downstream slit nozzle 12 has a temperature higher than the melting point, so that the natural thickness cooling in the outside air causes surface tension and the like to increase the tape thickness. However, it is easy to deform in the direction in which the tape width decreases.

  Therefore, the tape deformation can be prevented by providing the cooling metal rollers 64 and 66 immediately after the downstream slit nozzle 12 to rapidly cool the tape. Moreover, the strength of the obtained carbon fiber reinforced thermoplastic resin tape is high.

  The cooling metal rollers 64 and 66 are preferably attached as close as possible to the downstream side of the downstream slit nozzle 12. However, the position closest to the structure of the device is the axial distance between the nozzle metal rollers 20 and 26 and the cooling metal rollers 64 and 66 up to the sum of the radii of the rollers.

  On the other hand, when the tape is cooled by blowing air with a slit blower described later, it can be cooled very close to the downstream slit nozzle 12.

  The cooling metal roller 64 is attached to the support frame 68 and is fixed by an insertion bar (rotary shaft) 70. The cooling metal roller 64 is attached to support frames 72 a and 72 b (not shown), and is fixed by an insertion bar (rotating shaft) 74.

  Support frames 72a and 72b (not shown) are connected and fixed at fixed ends 76a and 76b (not shown). On the other hand, the support frame 68 is separated from the support frames 72a and 72b (not shown), and is not connected to the fixed end. The cooling metal roller 64 is provided with a pressure cylinder 78 via an insertion bar 74 and a support frame 68.

  Since other configurations are the same as those in FIG. 1, the same reference numerals are given to the same portions and the description thereof is omitted.

  FIG. 4 is a schematic front view showing still another example of the carbon fiber reinforced thermoplastic resin tape manufacturing apparatus of the present invention.

  In the manufacturing apparatus 82 in the example of FIG. 4, a slit blower 84 is provided immediately downstream of the downstream slit nozzle 12. Thereby, tape deformation | transformation can be prevented similarly to the above. Moreover, the strength of the obtained carbon fiber reinforced thermoplastic resin tape is high.

  Since other configurations are the same as those in FIG. 1, the same reference numerals are given to the same portions and the description thereof is omitted.

  In the manufacturing apparatus 2 in the example of FIG. 1 described above, the resin impregnation apparatus upper mold part 14 and the resin impregnation apparatus lower mold part 18 are configured to be detachable. It is easy to guide and attach the raw fiber, and the productivity can be improved.

  Moreover, in the manufacturing apparatus 2 of the example of FIG. 1, the nozzle upper roller 20 and the nozzle lower roller 26 comprise the insertion bars 24 and 30 by a free rotation system such as a ball bearing bearing, respectively. In this free rotation method, when the peripheral speed of the roller becomes equal to the traveling speed of the strand 4, a single yarn fluff generated from the strand 4 rarely wraps around the roller.

  In such a case, the nozzle upper roller 20 and the nozzle lower roller 26 are configured by a rotational method having a large rotational resistance such as a sliding bearing, or by a driving method of a method for controlling the peripheral speed of the roller, Can suppress fluff.

  In addition, the form of the carbon fiber reinforced thermoplastic resin tape manufacturing apparatus of the present invention is not limited to the form of FIGS. 1 to 5 and may be appropriately modified unless the gist of the present invention is changed.

  Carbon fiber reinforced thermoplastic resin tapes were produced under the conditions described in the following examples and comparative examples.

[Examples 1-8 and Comparative Examples 1-3]
In the manufacturing apparatus shown in FIG. 1, 2, or 6, after adjusting the stress between the downstream slit nozzle gap and the upper and lower nozzle members to the values shown in Table 1, the molten resin [polypropylene resin (homopolypropylene general-purpose The temperature of injection molding grade, melt flow rate 20 g / 10 min)] and the temperature of the upper and lower nozzle members were adjusted to 230 ° C.

  In this molten resin impregnation apparatus, raw material carbon fiber strand [Besfight STS-24K F301 manufactured by Toho Tenax Co., Ltd. (diameter 7 μm × 24000 filament, fineness 1.6 g / m)] or [Besfight HTA-12K manufactured by Toho Tenax Co., Ltd.] F202 (diameter 7 μm × 12000 filament, fineness 0.8 g / m)] was run at 2 m / min to produce a carbon fiber reinforced thermoplastic resin tape. The results are shown in Table 1.

[Examples 1 to 4]
In the manufacturing apparatus shown in FIG. 3, after adjusting the stress between the downstream slit nozzle gap and the upper and lower nozzle members to the values shown in Table 1, molten resin [polypropylene resin (homopolypropylene general-purpose injection molding grade, The temperature of the melt flow rate 20 g / 10 min)] and the temperature of the upper and lower nozzle members were adjusted to 230 ° C.

  In this manufacturing apparatus, the cooling metal roller was installed at a location of 200 mm in the axial distance between the nozzle metal roller and the cooling metal roller downstream of the downstream slit nozzle, and the temperature of the cooling metal roller was adjusted to 20 ° C.

  In this molten resin impregnation apparatus, raw material carbon fiber strand [Besfight STS-24K F301 manufactured by Toho Tenax Co., Ltd. (diameter 7 μm × 24000 filament, fineness 1.6 g / m)] or [Besfight HTA-12K manufactured by Toho Tenax Co., Ltd.] F202 (diameter 7 μm × 12000 filament, fineness 0.8 g / m)] was run at 2 m / min to produce a carbon fiber reinforced thermoplastic resin tape. The results are shown in Table 1.

  In Examples 1 to 4, since fine fluff was not accumulated inside the resin impregnation apparatus, even if the roller gap was extremely narrow, stable operation was possible. On the other hand, in Comparative Examples 1 to 3, in which the roller is a non-rotating nozzle (fixed nozzle) member and the pressure cylinder is not attached, when the slit gap is narrowed, for example, fuzzing occurs only when false twisting flows. Could not drive. Although the roller is a non-rotating nozzle (fixed nozzle) member, Examples 5 to 8 having a pressure cylinder are not accumulated or accumulated in the resin impregnation apparatus as in Examples 1 to 4. Therefore, even if the roller gap was extremely narrow, stable operation was possible.

  In Examples 9-12, as in Examples 1-8, since fine fluff was not accumulated inside the resin impregnation apparatus, stable operation was possible even when the roller gap was extremely narrow. In addition, the carbon fiber reinforced thermoplastic resin tapes of Examples 9 to 12 and particularly Examples 9 to 10 were immediately solidified by cooling and solidifying the carbon fiber reinforced thermoplastic resin tape spread by the ironing bar inside the resin impregnation apparatus and the heated metal roller. Therefore, a wide and flat shape can be produced, and a carbon fiber reinforced thermoplastic resin (CFRTP) molded product using the material has a high bending strength. On the other hand, in Examples 1 to 8 in which no cooling roller was arranged, the strand prepreg that had spread once became thin during natural cooling, and the CFRTP molded product using this as a material did not exhibit a very high bending strength.

  In addition, as for the manufacturing apparatus of the carbon fiber reinforced thermoplastic resin tape of FIGS. 1-3 used in Examples 1-12 and Comparative Examples 1-3, resin impregnation apparatus upper mold | type part 14 and resin impregnation apparatus lower mold | type part 18 are used. Since it is configured to be detachable, it is easy to guide and attach the raw fiber at the start of operation or when the raw fiber is replaced.

It is the schematic which shows an example of the manufacturing apparatus of the carbon fiber reinforced thermoplastic resin tape of this invention, (A) is a front view of the said manufacturing apparatus, (B) is a right view of the said manufacturing apparatus. It is the schematic which shows the other example of the manufacturing apparatus of the carbon fiber reinforced thermoplastic resin tape of this invention, (A) is a front view of the said manufacturing apparatus, (B) is a right view of the said manufacturing apparatus. . It is a schematic front view which shows the further another example of the manufacturing apparatus of the carbon fiber reinforced thermoplastic resin tape of this invention. It is a schematic front view which shows the further another example of the manufacturing apparatus of the carbon fiber reinforced thermoplastic resin tape of this invention. FIG. 2 is a schematic view showing a state in which a gap between a resin impregnation apparatus upper mold part and a resin impregnation apparatus lower mold part is opened in the production apparatus of the example of FIG. 1, (A) is a front view of the production apparatus; (B) is a right side view of the manufacturing apparatus. It is the schematic which shows the carbon fiber reinforced thermoplastic resin tape manufacturing apparatus used in Comparative Examples 1-3, (A) is a front view of the said manufacturing apparatus, (B) is a right view of the said manufacturing apparatus. .

Explanation of symbols

2, 52, 62, 82, 92 Carbon fiber reinforced thermoplastic resin tape manufacturing apparatus 4, 94 Carbon fiber 6, 96 Molten resin impregnation apparatus 8, 98 Resin supply path for supplying molten thermoplastic resin 10, 100 Upstream slit Nozzle 12, 102 Downstream slit nozzle 14, 104 Molten resin impregnating apparatus upper mold part 16, 106 Molten resin impregnating apparatus space part 18, 108 Molten resin impregnating apparatus lower mold part 20, 54, 110 Nozzle upper member 22, 28a, 28b , 68, 72a, 112 Support frame 24, 30, 70, 74, 114, 118 Insertion bar 26, 56, 116 Lower nozzle member 32a, 32b, 76a, 120a, 120b Fixed end 36, 78 Biasing means 38a, 38b Support Lower end of frame 40a, 40b Upper end of support frame 42a, 42b Gap adjusting means 44a, 44b, 122 Ironing bar 64, 66 Cooling metal roller 84 Slit blower P Sliding member X Arrow indicating the running direction of the carbon fiber strand

Claims (6)

In addition to a resin supply path for supplying molten thermoplastic resin and an upstream slit nozzle for supplying carbon fiber, the molten thermoplastic resin is housed inside and the carbon fiber traveling inside is impregnated with the molten thermoplastic resin. A carbon fiber reinforced thermoplastic resin tape manufacturing apparatus comprising: a molten resin impregnating device; and a downstream slit nozzle that pulls out a carbon fiber impregnated with the molten resin through the molten thermoplastic resin. A nozzle upper member and a nozzle lower member are attached to the downstream end portion of the impregnation apparatus at a predetermined interval, and the nozzle upper member and the nozzle lower member are arranged in a direction to reduce the gap between the nozzle upper member and the nozzle lower member. An apparatus for producing a carbon fiber reinforced thermoplastic resin tape comprising means for urging at least one of them. The apparatus for producing a carbon fiber reinforced thermoplastic resin tape according to claim 1, wherein the nozzle upper member and the nozzle lower member are rollers provided with means for temperature control in the range of 100 to 400 ° C. The manufacturing apparatus of the carbon fiber reinforced thermoplastic resin tape of Claim 1 which has a cooling metal roller downstream of a downstream slit nozzle. The manufacturing apparatus of the carbon fiber reinforced thermoplastic resin tape of Claim 1 which has a slit blower downstream of a downstream slit nozzle. The apparatus for producing a carbon fiber reinforced thermoplastic resin tape according to claim 1, wherein the upper mold part of the resin impregnation apparatus and the lower mold part of the resin impregnation apparatus are configured to be detachable. The apparatus for producing a carbon fiber reinforced thermoplastic resin tape according to claim 1, wherein a gap between the nozzle upper member and the nozzle lower member is 450 μm or less.

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